Apologies for hyperbole but this has got to be the dullest Star Wars trailer I’ve seen in a long time. Like, the idea is solid, but good God the guy looks and sounds like Starkiller without any “charisma” of the original. That cute droid is more interesting than he is.
The first time I heard ‘extra’ used in that sense was when I was going out with a Jamaican girl in about 1979 / 1980. So while I can accept it isn’t common parlance in your personal milieu it wasn’t dreamed up in the past 12 months.